If Facebook's maps for mobile have suddenly gotten a whole lot more (or less) accurate, there's a reason. The social network is now sourcing its location data from Here, Nokia's soon-to-be-sold mapping division. According to TechCrunch's sources, only the mobile web version is using the new information, but Facebook is currently testing whether to roll Here's Maps out to all of its standalone apps like Messenger and Instagram. It's hoped that, with more accurate geolocation data, the company can offer advertisers even more minute control over who gets what product thrown in their face. Of course, Facebook is also one of the companies that is believed to be considering buying Here outright. Given this news, however, we'd imagine it being a lot less likely -- after all, why buy the cow if you're getting the milk for free?